public CloseableTabItem() { InitializeComponent(); Data = FindResource("datahandler") as CloseableTabItemDataHandler; this.InternTextEdit.SyntaxHighlighting = LaserScriptHighlighter; this.HighlightedLine = new LineBackgroundRenderer(); this.InternTextEdit.TextArea.TextView.BackgroundRenderers.Add(this.HighlightedLine); Path = string.Empty; IsSaved = true; }